Expansion-joint for concrete pavements or the like



E. M. LAING.

EXPANSION JOINT FOR CONCRETE PAVEMENTS OR THE LIKE.

APPLICATION FILED APR.I0,19I4.

Patented Aug. 22, 1916.

%T% ATEN @FFTCE.

EDWARD M. LAING, 0F HIGHLAND PARK, ILLINOIS.

EXPANSION-JOINT FOR CONCRETE PAVEMENTS OR THE LIKE.

new and useful Improvement in Expansionv Joints for Concrete Pavements or the like, of which the following is a full, clear, concise, and exact description.

My invention relates to an expansion joint and more particularly to an expansion joint for concrete sections,- such as, for example, a

I joint for adjacent sections of a concrete pavement.

One object of my invention is to provide means for holding the parts of the joint together in proper relation to each other while the concrete is being put in place and until it becomes set, and which will, at all times, permit of the concrete expanding or contracting both before and after the concrete has hardened.

Another object of my invention is to provide simple and efficient means for holding the protecting plates forming a part of the expansion joint at the proper height or grade while the concrete is being poured in lace.

p Another object is to dispense with the installing bars heretofore commonly used in the construction of concrete pavements or the like. Such installing bars are supported above the joint and are in the way while the concrete is being applied and also while the finishing or surfacing is being done, and, moreover, said bars when removed leave undesirable openings in the concrete. My invention entirely dispenses with such bars, the joints being preferably supported on bases which remain embedded in the concrete beneath the surface thereof.

These and other objects of my invention and the several features thereof may be more readily understood by reference to the accompanying drawings, in which- Figure 1 is a perspective view, with parts of the concrete broken away, of a pavement provided with the expansion joint of my invention; Fig. 2 is an enlarged detailed view on the line 22 of Fig. 1; and Fig. 3. is a side view of the structure shown in Fig. 2.

Like reference numerals refer to like parts throughout the several views.

The protection plates or strips 1, 1 are spaced apart by a compressible sheet 2 of felt or other suitable resilient material.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Application filed April 10, 1914. Serial No. 830,920.

Said plates 1 and the sheet 2 may be of the usual well known construction, the plates being provided with the usual prongs 10 punched out of the plates for the purpose of anchoring the plates to the adj acene concrete sections 8.

The plates 1 with the interposed resilient material are shown as held in place by a combined flexible clamp and support. Said support is preferably composed of a band of metal in the form of a loop having a flat base a adapted to rest upon the foundatlon to which the concrete is applied. Extending upwardly from the ends of the base ,4 are the two standards 5, 5 which converge and which at the points 6, 6 are bent in parallel relation to each other to form the clamping jaws 9, 9. The support is preferably in the general form of a triangle, as shown in the drawings.

Tongues 7 7 are sheared and struck inwardly from the triangular support at the vertex thereof. The ends of each opposing pair of tongues 7 are secured together by bolts or rivets 8. The tongues being flexible with respect to the standards 5 and said standards likewise being somewhat springy, the jaws 9, 9 are capable of movement to- Ward and from each other, and at the same time firmly clamp in position the plates 1 and the strip 2 which are held between said jaws. In other words the jaws 9, 9, hold the protection strips under spring tension allowing for the necessary expansion or con traction of theconcrete.

The plates 1 rest upon the upper end of the tongues 7, and as many of said combined flexible clamps and supports are provided as may be necessary to properly hold the protection plates inplace while the concrete is being applied' During such operation there are no parts lying above the finished surface of the pavement to interfere with the work of applying the concrete and no parts which need be removed after the concrete has be come hardened.

While I have shown the preferred en1bodiment of my invention and the preferred manner of employing the supports for the protection plates, I do not wish to be understood as limiting myself in such respects to the particular structure shown and described. The fiexible clamp may be employed for holding the protection plates and felt together irrespective of the particular method of supporting the'joint while the concrete is being applied. Also it is not essential that the flexible tongues which yieldingly hold the plates together be entirely separate and distinct from the plates themselves.

What I claim is-:

1. In an expansion joint for concrete sections, the combination of two protection plates for adjacent sections of concrete, resilient material held between said plates, and yielding clamping jaws upon opposite sides of said plates, said jaws extending downwardly from said plates and forming supports therefor.

2. In an expansion joint for concrete sections, the combination of two protection plates for adjacent sections of concrete, re-

silient material held between said plates, and clamps for yieldingly clamping said plates, each of said clamps comprising a pair of jaws, flexible tongues struck from said jaws, and a bolt connecting the ends of said tongues.

3. In an expansion joint, the combination of a flexible clamp and support comprising a base, portions extending upward from said base to provide clamping jaws, other portions extending upward from said base between said jaws to provide supports with protection plates held between said jaws and supported by said supports and compressible material between said plates.

4. In an expansion joint, the combination with clamping supports each including parallel clamping jaws, flexible tongues struck from said jaws, and bolts connecting the ends of the tongues in pairs; of two protecting plates and interposed resilient mate rial held between said clamping jaws.

5. In an expansion joint, the combination with a combined flexible clamp and support comprising a base, two upwardly extending arms having their upper endsapproximately parallel with each other to form clamping jaws, and means for. yieldingly connecting said arms together; of two protection plates and a sheet of interposed resilient material clamped between said jaws.

6. In an expansion joint, the combination with a combined flexible clamp and support having a loop-shaped portion extended at its upper part to provide a pair of clamping jaws, said support having inwardly extending opposed tongues struck out therefrom, and a bolt connecting said tongues together, of a protection plate supported upon the upper end of said tongues between said jaws,

and resilient material separating said plates. In witness whereof, I hereunto subscribe my name this eighth day of April, A. D.

EDWARD M. LAING. Witnesses I MoCLELLAN YOUNG, GEo. B. Jones. 

